The best replacement for web.config is app.config.

The best alternatives to web.config are rated as following:
★★★★★  app.config
★★★★  applicationhost.config
★★★★  machine.config
★★★  htaccess
★  global.asax
★  settings
★  web.xml

Your alternative for web.config is not listed? Suggest!
Speaking about web.config, one probably shouldn't forget about connection string.

Other search terms related to web.config and their ratings are:
★★★★★ connection string
You have in mind a companion for web.config and it is not yet here? Propose!



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web.config
app.config
applicationhost.config